A nephrologist is a medical doctor who specializes in diagnosing and treating diseases related to the kidneys. They manage conditions such as chronic kidney disease, kidney stones, and hypertension. Nephrologists often work closely with patients who require dialysis or kidney transplants. These specialists use various tests, including blood and urine tests, to assess kidney function. They also provide guidance on lifestyle changes and medications to help maintain kidney health. Nephrologists play a crucial role in the overall management of patients with kidney-related issues, ensuring they receive appropriate care and support.